The Supermicro PWS-0021-2 is available from Calhoun Technologies. Calhoun Technologies can save your company up to 80% on IT Hardware. Manufacturer: Supermicro Part Number: PWS-0021-2 Details: Supermicro PWS-0021-2 Pws 0021 Pwr Supply 250W Etasis Efa 250 Rev.C